# What does **PI** stand for?

## What does **PI** mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: **PI**.

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We've found a total of **151** definitions for **PI**:

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PI | Principal Investigator | |

PI | Personal Information | |

PI | Personal Injury | |

PI | Principal Investigator | |

PI | Post Intelligencer | |

PI | Protease Inhibitor | |

PI | Principal Investigator | |

PI | Public Intoxication | |

PI | Propidium Iodide | |

PI | Private Investigator | |

PI | Pre-Invoice | |

PI | Performance Index | |

PI | Program Improvement | |

PI | Public Information | |

PI | Pages In | |

PI | Performance Improvement | |

PI | Programming Interface | |

PI | Pyramid Inch | |

PI | Philippine Islands | |

PI | Primary Investigator | |

PI | Performance Indicator | |

PI | Performance Indicator | |

PI | Polyimide | |

PI | Processing Instruction | |

PI | Proportional Integral |

#### What does **PI** mean?

- pi(noun)
- the ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846...

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"PI." *Abbreviations.com.* STANDS4 LLC, 2015. Web. 4 Oct. 2015. <http://www.abbreviations.com/PI>.